Finite Mathematics Exam 1 correct questions and verified answers

Finite Mathematics Exam 1 Cost Function - correct answers Specifies the cost C as the function of the number of terms x. Cost= Variable cost + fixed cost Marginal Cost - correct answers The slope (m), measures the incremental cost per item Fixed Cost - correct answers A constant (b) Linear Function - correct answers A cost function of the form C(x)=mx+b Residuals - correct answers The n quantities (Observed Value-Predicted Value) Sum-of-squares error (SSE) - correct answers Some of the squares of the residuals Regression Line - correct answers Also known as least squares line or best-fit line, associated with the points (x1,y1), (x2,y2)...(xn,yn) is the line that gives the minimum SSE Correlation Coefficient - correct answers Used to compare the goodness of fit of lines to different sets of data. Denoted as r, is between -1 and1. The closer r is to -1 or 1, the better the fit. Inconsistent System - correct answers When a system has no solutions Redundant System - correct answers When the second equation gives the same information as the first; one equation in two unknowns. Augmented Matrix - correct answers A system of linear equations is the matrix whose rows are the coefficient rows of the equations. Matrix - correct answers A rectangular array of numbers Matrix Addition: Associative Law - correct answers A+(B+C)=(A+B)+C Matrix Addition: Commutative Law - correct answers A+B=B+A Matrix Addition: Distributive Law - correct answers c(A+B)=cA+cB Identity Matrix - correct answers The matrix with 1s down the main diagnol (the diagonal starting at the top left) and 0s everywhere else - correct answers